The use of vegetable oils for engine fuels may seem insignificant today, but such oils may become, in the course of time, as important as petroleum and the coal-tar products of the present time.
植物油作为发动机燃料的使用在今天看来可能微不足道,但这些油或许会随着时间的推移变得像石油和煤焦油产品一样重要。
如果你不知道你要去哪里,任何路都会带你到达那里。
A good mathematician should be both rigorous and imaginative.
我确信宇宙中充满了智慧生命。只是它们太聪明了,不会来这里。